diff options
Diffstat (limited to 'src/corelib/io/qfilesystemwatcher_polling.cpp')
-rw-r--r-- | src/corelib/io/qfilesystemwatcher_polling.cpp | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/corelib/io/qfilesystemwatcher_polling.cpp b/src/corelib/io/qfilesystemwatcher_polling.cpp new file mode 100644 index 0000000000..23dca140d6 --- /dev/null +++ b/src/corelib/io/qfilesystemwatcher_polling.cpp @@ -0,0 +1,151 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qfilesystemwatcher_polling_p.h" +#include <QtCore/qtimer.h> + +QT_BEGIN_NAMESPACE + +QPollingFileSystemWatcherEngine::QPollingFileSystemWatcherEngine(QObject *parent) + : QFileSystemWatcherEngine(parent), + timer(this) +{ + connect(&timer, SIGNAL(timeout()), SLOT(timeout())); +} + +QStringList QPollingFileSystemWatcherEngine::addPaths(const QStringList &paths, + QStringList *files, + QStringList *directories) +{ + QStringList p = paths; + QMutableListIterator<QString> it(p); + while (it.hasNext()) { + QString path = it.next(); + QFileInfo fi(path); + if (!fi.exists()) + continue; + if (fi.isDir()) { + if (!directories->contains(path)) + directories->append(path); + if (!path.endsWith(QLatin1Char('/'))) + fi = QFileInfo(path + QLatin1Char('/')); + this->directories.insert(path, fi); + } else { + if (!files->contains(path)) + files->append(path); + this->files.insert(path, fi); + } + it.remove(); + } + + if ((!this->files.isEmpty() || + !this->directories.isEmpty()) && + !timer.isActive()) { + timer.start(PollingInterval); + } + + return p; +} + +QStringList QPollingFileSystemWatcherEngine::removePaths(const QStringList &paths, + QStringList *files, + QStringList *directories) +{ + QStringList p = paths; + QMutableListIterator<QString> it(p); + while (it.hasNext()) { + QString path = it.next(); + if (this->directories.remove(path)) { + directories->removeAll(path); + it.remove(); + } else if (this->files.remove(path)) { + files->removeAll(path); + it.remove(); + } + } + + if (this->files.isEmpty() && + this->directories.isEmpty()) { + timer.stop(); + } + + return p; +} + +void QPollingFileSystemWatcherEngine::timeout() +{ + QMutableHashIterator<QString, FileInfo> fit(files); + while (fit.hasNext()) { + QHash<QString, FileInfo>::iterator x = fit.next(); + QString path = x.key(); + QFileInfo fi(path); + if (!fi.exists()) { + fit.remove(); + emit fileChanged(path, true); + } else if (x.value() != fi) { + x.value() = fi; + emit fileChanged(path, false); + } + } + QMutableHashIterator<QString, FileInfo> dit(directories); + while (dit.hasNext()) { + QHash<QString, FileInfo>::iterator x = dit.next(); + QString path = x.key(); + QFileInfo fi(path); + if (!path.endsWith(QLatin1Char('/'))) + fi = QFileInfo(path + QLatin1Char('/')); + if (!fi.exists()) { + dit.remove(); + emit directoryChanged(path, true); + } else if (x.value() != fi) { + fi.refresh(); + if (!fi.exists()) { + dit.remove(); + emit directoryChanged(path, true); + } else { + x.value() = fi; + emit directoryChanged(path, false); + } + } + } +} + +QT_END_NAMESPACE |